一般情况下,坑内通风电耗占矿山总电耗15～20％,可见坑内通风电耗是很大的,湘潭锰矿采用下述方法实现通风节电。 1.改造现有的通风机。湘潭锰矿现用的是2By—18型(70B_2)风机,他们对这台主扇进行了技术测量,並经计算得到该机效率只有0.29。效率低的原因有二点:(1)电机使用年限长,绝缘老化,涡流铁损增加,空载电流增大,电机温度高,用于使电机降温的电耗大,7、8、9三个月需用11千瓦局扇给电机 Under normal circumstances, pit ventilation power consumption accounts for 15-20% of the total power consumption, we can see the pit ventilation power consumption is very large, Xiangtan manganese using the following method to achieve ventilation and power. 1. Rebuild the existing fan. Xiangtan manganese mine is currently used 2By-18 (70B_2) fan, they conducted a technical measurement of the main fan, and the aircraft was calculated by the efficiency of only 0.29. Low efficiency for two reasons: (1) long service life of the motor, insulation aging, increased eddy current iron loss, increased load current, the motor temperature is high, used to make the motor cooling power consumption, 7,8,9 three Month to 11 kW fan fan to the motor